Differential diagnosis of red macules, patches, and plaques on the vulva

Common	Less common	Rare
Candidiasis Atopic dermatitis (eczema) Lichen simplex chronicus Irritant contact dermatitis Psoriasis	Allergic contact dermatitis Lichen planus (papulosquamous form) Tinea cruris Perianal streptococcal infection Squamous intraepithelial lesions: High-grade squamous intraepithelial lesions Differentiated vulvar intraepithelial neoplasia	Plasma cell vulvitis Extramammary Paget disease Hailey-Hailey disease Erythrasma Tinea versicolor Pityriasis rosea Steroid dermatitis

The prevalence categories refer to vulvar manifestations of the listed diseases. The relative frequency of each may vary based on the patient population, geography, and type of clinical practice (eg, gynecology, dermatology, or internal medicine).

Graphic 95964 Version 8.0

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Differential diagnosis of red macules, patches, and plaques on the vulva